return ToStringFunction.INSTANCE;
  }

  // enum singleton pattern
  private enum ToStringFunction implements Function<Object, String> {
    INSTANCE;

    @Override
    public String apply(Object o) {
      checkNotNull(o); // eager for GWT.
      return o.toString();
    }

    @Override
    public String toString() {
      return "Functions.toStringFunction()";
    }
  }

      } else {
        return LinearTransformation.horizontal(yStats.mean());
      }
    } else {
      checkState(yStats.sumOfSquaresOfDeltas() > 0.0);
      return LinearTransformation.vertical(xStats.mean());
    }
  }

  private double ensurePositive(double value) {
    if (value > 0.0) {
      return value;
    } else {
      return Double.MIN_VALUE;
    }
  }

            buffer.decode(testBuffer, 0, testBuffer.length);
        }

        @Test
        @DisplayName("Should return correct pathConsumed value")
        void testGetPathConsumed() {
            assertEquals(50, buffer.getPathConsumed()); // 100 / 2
        }

        @Test
        @DisplayName("Should return correct numReferrals value")
        void testGetNumReferrals() {
            assertEquals(3, buffer.getNumReferrals());

        }

        @Override
        public byte getFileSystemInformationClass() {
            return informationClass;
        }

        @Override
        public int decode(byte[] buffer, int bufferIndex, int len) throws SMBProtocolDecodingException {
            return 0;
        }
    }

    @Nested
    @DisplayName("Interface Constants Tests")
    class InterfaceConstantsTests {

                return pattern;
            }
        }
        return resourceBundle.getString(messageCode);
    }

    /**
     * Returns the system name.
     *
     * @param messageCode
     *            Message code
     * @return System name
     */
    protected static String getSystemName(final String messageCode) {
        return messageCode.substring(1, Math.max(1, messageCode.length() - CODE_NUMBER_LENGTH));

	for index := range disks {
		g.Go(func() (err error) {
			if disks[index] == nil {
				return errDiskNotFound
			}
			rf, err := disks[index].ReadXL(ctx, bucket, object, readData)
			if err != nil {
				return err
			}
			rawFileInfos[index] = rf
			return nil
		}, index)
	}

	return rawFileInfos, g.Wait()
}

    @Override
    public BadWordDbm asDBMeta() {
        return BadWordDbm.getInstance();
    }

    @Override
    public String asTableDbName() {
        return "bad_word";
    }

    @Override
    public boolean hasSpecifiedColumn() {
        return _specification != null;
    }

    @Override
    public ConditionQuery localCQ() {
        return doGetConditionQuery();
    }

    @Override
    public ElevateWordDbm asDBMeta() {
        return ElevateWordDbm.getInstance();
    }

    @Override
    public String asTableDbName() {
        return "elevate_word";
    }

    @Override
    public boolean hasSpecifiedColumn() {
        return _specification != null;
    }

    @Override
    public ConditionQuery localCQ() {
        return doGetConditionQuery();
    }

    @Override
    public JobLogDbm asDBMeta() {
        return JobLogDbm.getInstance();
    }

    @Override
    public String asTableDbName() {
        return "job_log";
    }

    @Override
    public boolean hasSpecifiedColumn() {
        return _specification != null;
    }

    @Override
    public ConditionQuery localCQ() {
        return doGetConditionQuery();
    }

    @Override
    public PathMappingDbm asDBMeta() {
        return PathMappingDbm.getInstance();
    }

    @Override
    public String asTableDbName() {
        return "path_mapping";
    }

    @Override
    public boolean hasSpecifiedColumn() {
        return _specification != null;
    }

    @Override
    public ConditionQuery localCQ() {
        return doGetConditionQuery();
    }